<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			.box{
				width: 107px;
				height: 107px;
				margin: 100px;
				border: 1px solid black;
				border-radius: 50%;
				position: relative;
			}
			.box :first-child{
				width: 107px;
				height: 107px;
				background: url(img/a_1.png);
				border-radius: 50%;
			}
			
			.box:hover :first-child{
				background: url(img/a_1_h1.png);
				transform: rotate(360deg);
				transition: 2s;
			}
			
			.box a{
				width: 107px;
				height: 107px;
				position: absolute;
				left: 0;
				top: 0;
				color: white;
				text-align: center;
				line-height: 107px;
				border-radius: 50%;
			}
		</style>
	</head>
	<body>
		<div class="box">
			
			<div></div>
			
			<a href="">dddd</a>
			
		</div>
	</body>
</html>